The team has its sights set on Bryant McKinnie, a 12th-year veteran scheduled to visit the team Tuesday, a league source said Monday night. San Diego first expressed interest in McKinnie before the draft, interest that was solidified with the developments of last week's first round.

It's a busy time for the 33-year-old left tackle.

McKinnie, a Miami resident, popped by the Dolphins on Monday, taking a physical. The Ravens, too, are considered to be very much in the mix for him.

In 2012, McKinnie was a reserve for Baltimore before starting all four playoff games, including the team's Super Bowl win. If he was to join the Chargers, it's expected he would be their Week 1 starter at left tackle.

San Diego made an early upgrade at the position last month, signing King Dunlap. The versatile 6-foot-9 lineman has 19 career starts but appears best suited for a swing role.

Last week's draft didn't set up the Chargers to find a young, franchise left tackle.

Eric Fisher, Luke Joeckel and Lane Johnson were the three prospects considered ready to start immediately, but they, in rather historic fashion, went off the board in the first four selections. The team ultimately did address its offensive line in the first round, choosing former Alabama right tackle D.J. Fluker with the No. 11 pick.

Other options in free agency include Max Starks, a 31-year-old with 16 left-tackle starts for the Steelers in 2012.